Now navigate into the QFIL installation folder usually C:\Program Files (x86)\Qualcomm\QPST\bin and launch QFIL.exeUnder Build type, select (tick) Flat BuildUnder Select Programmer, Click Browse button then navigate to firmware folder open images folder and select prog_emmc_firehorse_XXXXX.mbn file.Click on Load XML and select rawprogram0.xml and Patch0.xmlOpen back cover of the device disconnect battery and then connect the phone to PCNow bridge the test points as shown on image below with a pair of twizzers or metal to put infinix X573 into EDL mode.

Port will now appear on QFIL tool.Click Download button and wait for flash process to complete.When process is complete, disconnect and boot up device.Note that first boot after flash process takes longer than usual.

For a more detail tutorial on how to flash this device with QFIL, click here